1) Open WinPwn 2.5 make sure you see the Pineapple button at the 3rd button from the top right.

2) Click the switch to turn Expert on.

3) Select iPhone 3g

4) Select 2.0 and click next

5) Click any up or down thumbs you want it doesnt matter at all.

6) It will take a few minutes to go through the process. Once you get through everything and get to the DFU portion follow the prompts as it says. Once you put it into DFU and it starts doing its thing again your iPhone screen will turn white. ONCE YOUR SCREEN TURNS WHITE close WinPwn.*ONCE YOUR SCREEN TURNS WHITE CLOSE WINPWN

7) Open up iTunes 8.2 then hold down shift and click restore. Select the CFW and it will do it's thing.

8) Once it is done leave it plugged in until itunes activates it then unplug and enjoy your jailbroken iPhone!

Last edited by jivy26; 2009-06-20 at 07:43 PM.
Reason: updated to link to ipsw's

As long as you sync before hand to back up your phone and then restore from that when you are finished you will have everything you had before back on your phone. Except the cydia apps, you have to reinstall those.